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0-20 Troubleshooting This section provides an easy reference guide to the more common problems which Remember that successful trou- bleshooting is not a mysterious art practiced the result of the right knowledge combined with an intelligent, systematic approach to the problem. Always work by a process of elimination, starting with the simplest solution Finally, always establish a clear idea of why a problem has occurred and take steps nection, check the other connections in the system to make sure that they don't fail as important component or system. engaged in Park (Chapter 7B) or clutch pedal Broken, loose or disconnected wiring in the starting circuit (Chapters 5 and 12). Starter motor pinion jammed in flywheel ring gear (Chapter 5). Starter solenoid faulty (Chapter 5). 7 Starter motor faulty (Chapter 5). 8 Ignition switch faulty (Chapter 12). 9 Starter pinion or flywheel teeth worn or broken (Chapter 5). Defective fusible link (see Chapter 12). 2 Engine rotates but will not start 1 Fuel tank empty. 2 Battery discharged (engine rotates slow- ly) (Chapter 5). Battery terminal connections loose or corroded (Chapters 1 and 5). Leaking fuel injector(s), faulty fuel pump, pressure regulator, etc. (Chapter 4). 5 Broken or stripped timing belt (Chap- ter 2). Ignition components damp or damaged (Chapter 5). Worn, faulty or incorrectly gapped spark plugs (Chapter 1). Broken, loose or disconnected wiring in the starting circuit (Chapter 5). Broken, loose or disconnected wires at the ignition coil(s) or faulty coil(s) (Chapter 5). Defective crankshaft sensor, camshaft sensor or PCM (see Chapter 6). 3 Engine hard to start when cold 1 Battery discharged or low (Chapter 1). 2 Malfunctioning fuel system (Chapter 4). 3 Faulty coolant temperature sensor or intake air temperature sensor (Chapter 6). Fuel injector(s) leaking (Chapter 4). 5 Faulty ignition system (Chapter 5). 6 Defective MAP sensor (see Chapter 6). 4 Engine hard to start when hot 1 Air filter clogged (Chapter 1). 2 Fuel not reaching the fuel injection sys- tem (Chapter 4). 3 Corroded battery connections, espe- cially ground (Chapters 1 and 5). 4 Faulty coolant temperature sensor or intake air temperature sensor (Chapter 6). 6 Engine starts but stops 1 Loose or faulty electrical connections at ignition coil (Chapter 5). Insufficient fuel reaching the fuel injec- tor(s) (Chapters 4). Vacuum leak at the gasket between the intake manifold/plenum and throttle body Fault in the engine control system (Chapter 6). Intake air leaks, broken vacuum lines (see Chapter 4). Oil puddle under engine 1 Oil pan gasket and/or oil pan drain bolt washer leaking (Chapter 2). Oil pressure sending unit leaking (Chap- ter 2C). 3 Oil filter or adapter block leaking (Chap- ter 1). Valve cover(s) leaking (Chapter 2). 5 Engine oil seals leaking (Chapter 2). 8 Engine lopes while idling or idles erratically 1 Vacuum leakage (Chapters 2 and 4). 2 Leaking EGR valve or EGR vacuum lines (Chapter 6). Air filter clogged (Chapter 1). 4 Fuel pump not delivering sufficient fuel to the fuel injection system (Chapter 4). Leaking head gasket (Chapter 2). 6 Timing belt and/or pulleys worn (Chap- ter 2). Camshaft lobes worn (Chapter 2). 9 Engine misses at idle speed 1 Spark plugs worn or not gapped prop- erly (Chapter 1). Faulty spark plug wires (Chapter 1). 3 Vacuum leaks (Chapters 2 and 4). 4 Faulty ignition coil(s) (Chapter 5). 5 Uneven or low compression (Chapter 2). 6 Faulty fuel injector(s) (Chapter 4). 10 Engine misses throughout driving speed range 1 Fuel filter clogged and/or impurities in the fuel system (Chapter 4). Low fuel output at the fuel injector(s) (Chapter 4). Faulty or incorrectly gapped spark plugs (Chapter 1). Defective spark plug wires (Chapters 1 or 5). Faulty emission system components (Chapter 6). Low or uneven cylinder compression pressures (Chapter 2). Burned valves (Chapter 2). 8 Weak or faulty ignition system (Chap- ter 5). 9 Vacuum leak in fuel injection system, throttle body, intake manifold or vacuum hoses (Chapter 4). 11 Engine stumbles on acceleration 1 Spark plugs fouled (Chapter 1). 2 Problem with fuel injection system (Chapter 4). 3 Fuel filter clogged (Chapter 4). 4 Fault in the engine control system (Chapter 6). Intake manifold air leak (Chapters 2 and 4). EGR system malfunction (Chapter 6). Engine 5 Starter motor noisy or 1 Engine will not rotate when excessively rough in engagement attempting to start 1 Pinion or flywheel gear teeth worn or 1 Battery terminal connections loose or broken (Chapter 5). 2 Starter motor mounting bolts loose or missing (Chapter 5). corroded (Chapters 1 and 5). Battery discharged or faulty (Chapter 1). 3 Automatic transaxle not completely |